ci: Move from Clear Linux to Ubuntu Focal Fossa cloud image

Move the CI to rely entirely on Ubuntu cloud images. It's worth noting
that both QCOW2 and RAW images from Ubuntu Focal Fossa have been
modified to include the tools needed from integration tests.
This means fio, iperf, iperf3, netcat and socat have been added to the
image. The snapd package have been fully removed as it was expecting the
support for squashfs (not present when using our own kernel from direct
kernel boot), which was causing some failures, and was preventing
cloud-init from terminating properly.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

test_data/cloud-init/clear/openstack/latest/meta_data.json

@@ -1,3 +0,0 @@
-{
-  "hostname" : "cloud"
-}

test_data/cloud-init/clear/openstack/latest/user_data

@@ -1,80 +0,0 @@
-#cloud-config
-users:
-  - name: cloud
-    passwd: $6$7125787751a8d18a$sHwGySomUA1PawiNFWVCKYQN.Ec.Wzz0JtPPL1MvzFrkwmop2dq7.4CYf03A5oemPQ4pOFCCrtCelvFBEle/K.
-    sudo:
-      - ALL=(ALL) NOPASSWD:ALL
-write_files:
-  -
-    path: /etc/systemd/network/00-static-l1.network
-    permissions: 0644
-    content: |
-        [Match]
-        MACAddress=12:34:56:78:90:ab
-
-        [Network]
-        Address=192.168.2.2/24
-        Gateway=192.168.2.1
-
-  -
-    path: /etc/systemd/network/00-static-l2-1.network
-    permissions: 0644
-    content: |
-        [Match]
-        MACAddress=de:ad:be:ef:12:34
-
-        [Network]
-        Address=192.168.2.3/24
-        Gateway=192.168.2.1
-
-  -
-    path: /etc/systemd/network/00-static-l2-2.network
-    permissions: 0644
-    content: |
-        [Match]
-        MACAddress=de:ad:be:ef:34:56
-
-        [Network]
-        Address=192.168.2.4/24
-        Gateway=192.168.2.1
-
-  -
-    path: /etc/systemd/network/00-static-l2-3.network
-    permissions: 0644
-    content: |
-        [Match]
-        MACAddress=de:ad:be:ef:56:78
-
-        [Network]
-        Address=192.168.2.5/24
-        Gateway=192.168.2.1
-
-  -
-    path: /etc/systemd/system/vfio.service
-    permissions: 0644
-    content: |
-        [Unit]
-        Description=VFIO test systemd service
-
-        [Service]
-        Type=simple
-        ExecStart=/bin/bash /usr/bin/cloud-hypervisor-vfio.sh
-
-        [Install]
-        WantedBy=multi-user.target
-
-  -
-    path: /usr/bin/cloud-hypervisor-vfio.sh
-    permissions: 0755
-    content: |
-        #!/bin/bash
-
-        mount -t virtiofs -o dax myfs /mnt
-        bash -c "echo 0000:00:05.0 > /sys/bus/pci/devices/0000\:00\:05.0/driver/unbind"
-        bash -c "echo 1af4 1041 > /sys/bus/pci/drivers/vfio-pci/new_id"
-        bash -c "echo 0000:00:06.0 > /sys/bus/pci/devices/0000\:00\:06.0/driver/unbind"
-        bash -c "echo 1af4 1041 > /sys/bus/pci/drivers/vfio-pci/new_id"
-        # 1G ram requires 512 pages
-        echo 512 | sudo tee /proc/sys/vm/nr_hugepages
-        sudo chmod a+rwX /dev/hugepages
-        /mnt/cloud-hypervisor --kernel /mnt/vmlinux --cmdline "console=hvc0 reboot=k panic=1 nomodules i8042.noaux i8042.nomux i8042.nopnp i8042.dumbkbd root=PARTUUID=6fb4d1a8-6c8c-4dd7-9f7c-1fe0b9f2574c VFIOTAG" --disk path=/mnt/clear-31311-cloudguest.img path=/mnt/cloudinit.img --cpus boot=1 --memory size=512M,hotplug_size=1G,file=/dev/hugepages --device path=/sys/bus/pci/devices/0000:00:05.0/ path=/sys/bus/pci/devices/0000:00:06.0/ --api-socket /tmp/ch_api.sock